We make custom cables Mounting adapter thread screw for SmallHD monitor to ARRI camera cage rig accessory or extension magic arm 1/4"-20 to 3/8"-16 adapter, there are 2 of small pins to prevent it from twisting on the cage, rig The adapter is with 3/8"-16 thread and 1/4"-20 screw For mounting monitor accessory with a 1/4"-20 thread to camera or cage rig with 3/8"-16 screw ARRI-style anti-twist pins Material: aluminium, sturdy and durable. Color available: Black